Devolving doob



I. F. SUNDERLAND.

REVOLVING DOOR APPLICATION FILED AUG.23 me.

1,303,988. Patented May 20, 1919.

INVENTOH asunder/a 27d 15 11 15 11 75 59 ATTORNEY Join: r. sun'nnnnann,or NATICK. MASSACHUSETTS.

REVOLVING DOOR. I

Specification of Letters Patent.

Patented May edema.

Application filed August 28,1916. Serial No; 116,451.

To all whom it may concern:

Be it known that 1, JOHN F. SUNDERLAND, a citizen of the United States,and a resident of the town of Natick, in the county ofMiddlesex andState of Massachusetts; have invented certain new and usefulImprovements in Revolving Doors, of which the following is aspecification.

The present invention relates to improvements in revolving doors, andparticularly such doors of the class known as panic-proof doors, thecharacter of which is that theyare collapsible when an unusual pressureis exerted thereon as in a panic. An object 'of the present invention isto provide such a door which willbe automatic and positive in itsaction, siinple and reliable in construction and will dispense with theuse of straps, cables, bars and the like as have been heretoforeemployed, and in which the collapsing mechanism will be inclosed withina comparatively small compass, forming an unconspicuous part of thedoor.

Wliththese and other objects in view my invention is shown in theaccompanying drawings, and will be'hereinafter more fully described withreference thereto and finally pointed out in the claims.

In the accompanying drawin 5,'

Figures 1, 1 and 2 are iagrammatic views, showing the closed or'normalosition of the doors, a position with two of tlie doors locked and theother two swinging, and the collapsed or open position, respectivel Fig.3 is a plan view of the upper side of the top disk or plate and also thelower side of the bottom disk, showingthedoor in normal or closedposition.

Fig. 4 is a similar view showing two ofdot and dash the doors collapsed,and in lines the doors folded in pairs Fig. 5 is a sectional view takenalong the line 5-5 of Fig. 3,

Fig. 6 is a plan view of the under side of the top. disk and the upperside of the bottom disk, and showing the doors in a similar p0- si'tion,to that shown in Fig. 4.

Fig. 7 is a sectional view along the line 77 of Fig. 3, and a there; areprovided Fig. 8 is a fragmentary view of a slightly modified form ofconstruction in which the door is capable of being released from thelocking means.

Similar reference characters indicate corresponding parts throughout theseveral figures of the drawings. 7

Referring to the drawings, my improved door comprises a center shaft 10,and four revolving wings 11, radially disposed about the said shaft.Disks 12, revoluble about the central axis, are provided both at the topand the bottom of the door, Figs. 3 and 4, representing atop View of theupper disk and a bottom view of the'lo'wer disk. For convenience thedescription will be'confined to the top portion of the door, the lowerpor-- tion being exactly the same, but in reversed position. On theupperside'ot the said disk there is provided alarge square geared por' tion13, raised from the disk, and spaced fromthe edges of the said gearedportion there are provided slots or' grooves 14, forming a square aboutthe said squared gear. To each of the wings 11 is secured rigidly ateach end (top and bottom) a hanger 1-5 which is forked or recessed, asat 16, to straddle the disk, and disposed within the recess and rigidwith the hanger (and therefore with the: wing) there is arranged ageareddisk 17 which engages the teeth of one side of the large squaregear 13 and to which is attached an axial pin 18 which engages and turnsin a rectangular shaped shoe 19slidable in the slot 14. As the geareddisk 17 rolls on the. square geared portion 13 (under conditionsspecified hereinafter), the pin 18 rigid with said disk 17' will turn inthe shoe 19, and the latter will slide in the groove or slot 14.

-- Upon thereare provided fou'rsmall disks 20- whose axes are paralleltothe shaft. 10, and are located midway between the endsof the slots 14and centrally thereof. These disks and the large squaregear are rigidwith the disk 12, and may be integrally formed therewith.

In the lower surface of each of the disks 20 the under side of the upperdisk 12- grooves 21 radiating from the center. Below each of the disks20 there is provided a disk 22, of corresponding size, rotatable upon apin 23 screwed into the disk 20. A single ridge 24 provided on the upperface of the disk 22 is adapted to fit into one of the grooves 21 of thedisk 20, the said disk 22 being held against the I "disk 20 by means ofa spring 25 disposed upon thepin 23 and inclosed within a sleeve orcasing 26 surrounding the pin. The ridge 24 as well as the grooves 21are semi-circular in cross section, it being understood that each ridge24 is straight and radial with reference to its disk 22. The tension ofthe spring may be regulated by turning the pin 23, by means ofthe screwhead 27 The disk 22 is provided with a recess 28 extending inwardly fromthe periphery thereof, which inman position of the wings is engaged by apin 29 carried by the wing. The construction at r the lower end of thedoor as above pointed out, is exactly like the above describedconstruction, but in inverted position.

.The operation of the door is as follows: During the ordinary use of thedoor the wings and disks revolve upon the shaft in the well knownmanner. The resilient engagement of the disk 22 with'the disk 20 is ofsuch strength as to maintain the doors rigid, against the pressureexerted thereon during the normal use thereof. Should any unusualpressure be applied, as for instance in a panic by a number of personsforcing themselves against the two inner wings as indicated by thearrows (Fig. 1), the pins 29 disposed within the recesses 28 exert asimilar pressure upon the disks 22 forcing I the ridge 24 out ofengagement with the groove 21, against the pressure of the spring 25,thereby permitting the wing to turn with respect to'the disk 12, theridge 24 dropping into the next groove 21. The geared disk 17 rollsalong the square gear, forcing the shoe position (near a corner of thesquare gear 13) until the wing isbrought around again toward its normalposition, when the pin 29 will again engage the recess 28 and continuedpressure upon the wing will force the ridge 24 to leave the groove intowhich it has fallen. The disk 22 will turn on the pin 23 until the winghas again assumed its normal position, when the ridge 24 will againbecome seated in the groove 21 which is radially disposed with respectto the-large disk 12. v

In Fig. 4 I have shown in dot and dash lines, the manner in which thewings may be folded in pairs. When thus folded, it will V a slot 29provided in the wall of said socket,

so that said pin 29 may be broughtintoor out of engagement with theholding plate or disk 22, at the recess 28. It will be underbe noted theridge 24 .is seated in one of the stood that when the pin 29 isdisengaged from the wing, the latter may swing independently of theholding mechanism. In this way two of the wings may be used as movingwings, as illustrated in Fig. 1 the other two wings being bolted to theceiling I that changes may be made therein within the spirit and scopethereof, as-defined in the appended claims.

I claim:

1. In a revolvin door,a revolving support, a plurality 0 Wings normallyradiating from said support and connected therewith to swing relativelythereto, plates mounted to turn on said support about axes parallel tothat of the support, and also movable lengthwise of said axes, springstending to force said plates lengthwise of their axes toward saidsupport and into holding engagement therewith, and codperating means onthe wings and on the respective plates, normally in engagement toconnect the wings with said plates, but adapted to be brought out ofengagement to release the wings.

2. In a revolvin door, a plurality of wings normally ra iating from acommon axis and provided with gears which are rigid with the respectivewings, a support mounted to revolve about said axis and provided with apolygonal gear in mesh with said wing gears in mesh with the polygonalthe several wing gears, means for keeping gear as they roll' along it,and springpressed means located at the central portion a of, each of thesides of the polygonal gear for normally holding the wings rigid withsaid support, in positions extending through said central portions andthrough said axis.

3. In a revolving door, a revolving support provided with a polygonalgear, a .plu-

rality of wings normally radiating from-the aXisabout which the supportrevolves, and provided with gears in mesh with said polygonal gear,means for keeping said wing gears in mesh with the polygonal gear asthey roll along it, and means located at the central portions of thesides of the, polygonal gear for" normally locking the wings to therevolving support in positions in which said intersection being adjacentto the central portions of the sldes of the polygonal gear,

plates mounted to turn on said support about axes passing through saidpoints of intersection, and each provided with a rib adapted to fit saidgrooves, and also provided with a slot extending outwardly to theperiphery of such plate, and each of the wings bein provided with a pinnormally within sai slot but adapted to slip out of it, and springs forpressing the" respective plates against the grooved surfaces of therevolving support.

5. In a revolving door, a central pivot, a 7

- plurality of wings radiating from said bly pivot, a revolvingsupporting plate for said 'wings, means pivotally connecting said wingsto said supporting plate, a spring pressed plate for each of said wingsrotatasecured to said supporting plate and provided with yieldableholding means, and means carried by said wings connecting said wingswith said rotatable plates, said springpressed plates adaptedto holdsaidgwings rigid with said supporting plate during ordinary pressure onsaid wings, unusual pressure on said wings adapted to move said holdingmeans into non-holding position to permit collapsing of said wings.

6. Ina revolving door, a revolving support provided with a o'lygon'algear, a plurality of wings norma ly radiating from the axis about whichthe support revolves, and

unusual strain.

' said slide about an axis paralle provided with gears in mesh with saidpolygonal gear, means for keeping said wing gears in mesh with thepolygonal gear as they roll along it, plates mounted to turn on saidsupport about axes parallel to that of the support, and also movablelengthwise of such axes, mating rib and groove formations on thecontacting surfaces of said plates and of said support, springs tendingto force said plates lengthwise of their axes toward the support, andcooperating means on the wings and on the respective plates, to causethe latter to be turned on their axes and release the correspondingwings under unusual strain.

7. In a revolving door, a revolving support provided with a polygonalgear and a slot surrounding the gear, slides mountedto travel in saidslot but held against turning, wings pivoted to said slides about axesparallel to that of the support, gears coaxial with the wing pivots andrigidly secured to the respective wings, and in mesh with the polgonalgear of the support, and means located at the rentral portions of therespective sides of the polygonal ear, for norlinally locking the wingsto t e support in radial positions extending from the respective centralportions. i

8. In arevolving door, a revolving support, a wing connected with saidsupport and adapted to swing about an axis parallel to that of thesupport, a platemounted to. turn on the support about an axis coincidingwith that of the wing, said plate being-also movable lengthwise of itsaxis, mating rib and groove formations on'the contacting surfaces ofsaid plate and said support, a spring tending to force said plate towardthe support, and cooperating means on the wing and on the plate tonormally lock the wing to the support, but cause the plate to be turnedand t e'wing to be released under 9. In a revolving door, a revolvingsup-. port provided with a guideway, a sl de movable along saidguideway, a win pivoted to to that of the support, a platepivoted tosaid support about an axis which coincides with the wing in a certainposition of the wing,

said plate being also movable lengthwise of.

its axis, andispring-pressed toward the support cooperating means on thecontacting surfaces of the support and of said plate to normally lockthe plate to the support, and

cooperating means on the wing and on said plate to normally couple thewing to said plate, yet allow them to become disconnected, and the wingto swing on its pivot relatively to the support when the wing issubjected to an unusual strain.

10. In a revolving door, a revolving supporting plate provided; with apolygonal that of v gear on one of its sides, locking means on the otherside of said plate, a plurality of wings normally radiating from theaxis about which said plate revolves, and provided with gears engagingthe said polygonal gear on one side of the revolvin plate, and withmeans .for engaging said looking means on the other side of said plate,and means for keeping said wing gears in mesh with the polygonal gear asthey roll .l0 along it.

In testimony, that I claim the foregoing as my invention, I have signedmy name in 7 presence of two subscribing witnesses.

JOHN F SUNDERLAND.

Witnesses: CHAS. M.. SAWYER, EDWIN SKILLMAN.

